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189149 is a prime number
BaseRepresentation
bin101110001011011101
3100121110112
4232023131
522023044
64015405
71415312
oct561335
9317415
10189149
1111a124
1291565
136812c
144cd09
153b09e
hex2e2dd

189149 has 2 divisors, whose sum is σ = 189150. Its totient is φ = 189148.

The previous prime is 189139. The next prime is 189151. The reversal of 189149 is 941981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156025 + 33124 = 395^2 + 182^2 .

It is an emirp because it is prime and its reverse (941981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-189149 is a prime.

Together with 189151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94574 + 94575.

It is an arithmetic number, because the mean of its divisors is an integer number (94575).

2189149 is an apocalyptic number.

It is an amenable number.

189149 is a deficient number, since it is larger than the sum of its proper divisors (1).

189149 is an equidigital number, since it uses as much as digits as its factorization.

189149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 32.

The square root of 189149 is about 434.9126349050. The cubic root of 189149 is about 57.4030123021.

The spelling of 189149 in words is "one hundred eighty-nine thousand, one hundred forty-nine".